High-voltage switchgear and controlgear - Part 212: Compact Equipment Assembly for Distribution Substation (CEADS) for AC voltages up to 52 kV

2Scope / Description

This part of IEC 62271 specifies the service conditions@ rated characteristics@ general structural requirements and test methods of the assemblies of the main electrical functional units of a high-voltage/low-voltage distribution substation@ duly interconnected@ for alternating current of rated operating voltages above 1 kV and up to and including 52 kV on the highvoltage side@ service frequency 50 Hz or 60 Hz. This assembly is to be cable-connected to the network@ and intended for installation within an indoor or outdoor closed electrical operating area. A Compact Equipment Assembly for Distribution Substation (CEADS) as defined in this document is designed and tested to be a single product with a single serial number and one set of documentation. The functions of a CEADS are: ? switching and control for the operation of the high-voltage circuit(s); ? protection of the high-voltage/low-voltage transformer functional unit; ? high-voltage/low-voltage transformation; ? switching and control for the operation and protection of the low-voltage feeders. However relevant provisions of this document are also applicable to designs where not all of these functions exist (e.g. equipment comprising only high-voltage/low-voltage transformation and switching and control for the operation and protection of the low-voltage feeder functions or equipment without switching and control for the operation of the high-voltage circuit(s)). NOTE For the purpose of this document a self-protected transformer is considered not as a CEADS@ but as a functional unit@ designed and type tested to its own product standard IEC 60076-13:2006